Cutaneous Ciliated Cyst in an Unusual Location: Between Two Scapulas

Abstract

Cutaneous ciliated cyst is defined as a rare, painless lesion frequently encountered on the lower extremities of young girls after puberty. The cyst is surrounded by the columnar ciliary epithelium. Apart from the lower extremities of girls, they may be localized on the scalp, scapula, thumb, abdomen, umbilicus, thigh, heel, knee, and gluteal region. There are two theories to explain this localization. The first is that they are mullerian heterotrophy, while the other is that they are ciliated metaplasia of eccrine glands. In this paper, we described a cutaneous ciliated cyst, which was observed with a previously undescribed localization on the back of a 13-year-old female patient.

A Remarkably Rare Position of a Cutaneous Ciliated Cyst in a 16 Month-old Female

“…Consequently, during menarche hormonal stimulation plays a role in the growth of those cystic formations (2)(3)(4)(5). A second theory, concerning the etiological background of this entity, supports the cilia metaplasia of the eccrine glands.…”

Cutaneous ciliated cyst: A case report

“…In our case, the cyst was overlying the gluteal area, it measured 4 cm in the greatest dimension and was non tender, these findings were in concordance with the findings in literature. 6 The lesions typically measured several centimeters in diameter and presented as unilocular or multilocular cysts. A study describing the cysts histologically, reported that the cysts are typically lined by ciliated cuboidal to columnar epithelium with pseudostratified areas and that focal squamous metaplasia is occasionally present.…”

“…3 Previous reports indicated the cysts as varying from 1 to 4 cm in size, and the cysts are generally soft in texture and non tender masses. 6 The etiology is yet to be completely understood, however so far there are few theories that are still being studied. The first is that they are an ectopic mullerian residue as they resemble the fallopian tube epithelial lining.…”

“…Mullerian rest cells arrest at various levels and grow to form cysts, under hormonal stimulation after reaching puberty. 1,6,7 According to the mullerian heterotrophy theory, the fallopian tubes develop from remnants of the paramesonephric duct during the 6-7th weeks of gestation in the embryologic period. 6 It is possible that these cells could detach and incorporate within the lateral mesoderm and thus, migrate locally in the area of the lower back, abdominal wall, or lower limb bud.…”

“…1,6,7 According to the mullerian heterotrophy theory, the fallopian tubes develop from remnants of the paramesonephric duct during the 6-7th weeks of gestation in the embryologic period. 6 It is possible that these cells could detach and incorporate within the lateral mesoderm and thus, migrate locally in the area of the lower back, abdominal wall, or lower limb bud. 3 Besides these it can reach the scalp, fingers, heels, or knees during this period.…”